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fix(il2cpp): preserve recognized truncated metadata prefixes

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morluto
2026-10-21 01:47:09 +08:00
parent eb7acc70bf
commit b3aadaf474
10 changed files with 273 additions and 25 deletions
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src/il2cpp/Il2cppMetadataFile.ts
+9 -4
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@@ -4,13 +4,13 @@ import {
Il2cppMetadataFormatFailure,
} from "./Il2cppMetadataFormat.js";
import {
IL2CPP_METADATA_MAGIC,
IL2CPP_METADATA_VERSIONS,
il2cppMetadataSectionNames,
type Il2cppMetadata,
type Il2cppMetadataSection,
type IL2cppMetadataSectionName,
} from "../domain/il2cpp/il2cppMetadata.js";
import { observeIl2cppMetadataHeaderPrefix } from "../domain/il2cpp/il2cppMetadataHeaderPrefix.js";
import {
readIl2cppMembers,
readIl2cppMemberTables,
@@ -129,13 +129,18 @@ const isIndexWidth = (value: number): value is IndexWidth =>
value === 1 || value === 2 || value === 4;
const readHeader = (bytes: Buffer) => {
const magic = bytes.length < 4 ? null : bytes.readUInt32LE(0);
if (bytes.length < 8 || magic !== IL2CPP_METADATA_MAGIC)
const prefix = observeIl2cppMetadataHeaderPrefix(bytes);
if (prefix.kind !== "il2cpp")
throw new Il2cppMetadataFormatFailure(
"unrecognized-magic",
"the file does not start with the IL2CPP global-metadata magic 0xFAB11BAF; encrypted or non-metadata inputs are not decoded",
);
const version = bytes.readInt32LE(4);
if (prefix.version === null)
throw new Il2cppMetadataFormatFailure(
"truncated-header",
`the file has ${bytes.length} bytes, fewer than the 8-byte magic/version prefix; the metadata version is unknown`,
);
const { magic, version } = prefix;
if (!isSupportedVersion(version))
throw new Il2cppMetadataFormatFailure(
"unsupported-version",